Side light-emitting lamp without light guide plate
A technology with no light guide plate and side lighting, applied in the field of LED lighting, can solve the problems of high product cost and heavy weight
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Embodiment 1
[0030] Such as Figure 1 to Figure 4 In the shown embodiment, a side-emitting lamp without a light guide plate includes a housing provided with mounting slots and an LED light source 4 arranged in the housing. The housing is composed of a housing 1 and a rear cover 6. The LED light source is welded on the flexible substrate in the form of a circular patch using luminescent particles, and the flexible substrate is fixed on the back cover through adhesive. A light-diffusing device 2 is provided on the light-emitting surface of the opening of the shell, and the light-diffusing device is milky white for light uniformity. Rear cover is equipped with spring accessory 7, power cord fixing cover plate 8 and driving etc.
[0031] The side-emitting lamp also includes a first optical device 5 and a second optical device 3 that can transmit light. Both the first optical device and the second optical device are disc-shaped, and the first optical device is arranged at the bottom of the ins...
Embodiment 2
[0034] Embodiment 2: as Figure 6 to Figure 8 In the shown embodiment, a side-emitting lamp without a light guide plate is basically the same in structure as Embodiment 1, except that the second optical device protrudes to the side away from the first optical device, as shown in the figure 6. It is curved, and the second optical device adopts PC board.
[0035] Since the reflectivity and incident angle satisfy:
[0036] Rs=|(n1cosθi-n2cosθt) / (n1cosθi+n2cosθt)|^2=|(n1cosθi-n2√(〖1-(n1 / n2sinθi)〗^2) / (n1cosθi+n2√(〖1-(n1 / n2 sinθi)〗^2)))|^2
[0037] Rp=|n1cosθt-n2cosθi) / (n1cosθt+n2cosθi)|^2=|(n1√(〖1-(n1 / n2 sinθi)〗^2)-n2cosθi) / (n1√(〖1-(n1 / n2 sinθi)〗^2)+n2cosθi)|^2
[0038] R=1 / 2(Rs+Rp)
[0039] Among them: R is the reflectivity, Rs is the s component of the light vector perpendicular to the incident surface, Rp is the p component of the light vector parallel to the incident surface, θi is the incident angle, θt is the intermediate variable, n1=1, n2=1.59, this In the embodiment...
Embodiment 3
[0041] Such as Figure 9 , Figure 10 As shown, a side-emitting lamp without a light guide plate, its structure is basically the same as that of Embodiment 2, the difference is that: the side of the second optical device close to the first optical device has a zigzag annular microstructure, and the other side is Plane, the height h of the zigzag ring microstructure is 50-200 μm, the spacing d of the microstructure, and the ratio h / d gradually decreases from 0.5 at the edge of the second optical device to its center direction to 0, which improves the uniformity of light output. The principle Same as Embodiment 2, the structure is more flat and compact than Embodiment 2, and the thickness of the lamp is reduced.
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